Apparatus for producing color effect in paper



April 35- J. A. ROSMAIT 1,996,832

APPARATUS FOR PRODUCING COLOR EFFECT IN PAPER Filed July 30, 1932 3 Sheets-Sheet 1 INVENTOR.

c/o/m A. Fosmczit."

ATTORNEY-S.

April 1935- .1. A. ROSMAIT 1,996,832

APPARATUS FOR PRODUCING COLOR EFFECT IN PAPER Filed July so, 1952 3 Sheets-Sheet 2 IIIVVENTOR. do/m A. ficsmait ATTORNEYS.

April 1935- J. A. ROSMAITI 1,996,832

APPARATUS FOR PRODUCING COLOR EFFECT IN PAPER Filed July 30, 1932 s Sheets-Sheet s F v g I? I 01 I 1T]: f. Q A I n I p Q Q) E! a? qt} '3 ATTORNEYS.

Patented Apr. 9, 1935 APPARATUS FOR PRODUCING COLOR EFFECT 1N PAPER John A. Rosmait,

Manistee, Mich.

Application July, so, 1932, Serial No. 626,400 Claims. (01. 92-40) My invention relates to an improved process of and apparatus for 7 manufacturing decorative colored paper by depositing color in the pulp pool on the Fourdrinier w'ire during the manufacture 5 of the paper. v

The invention relates to providing decorative color effects on paper during its manufacture rather than as a result of printing the same on. the paper following its manufacture, andan obl0 ject is to provide a process and apparatus whereby the amount ofcolor deposited may be accurately controlled over a broad range so as to. produce widely varying color effects. .Through the employment of my improved process and aplll paratus it is possible to regulate the amount of color deposited so that the color efiects produced in the paper may be varied by minute steps or' changes from a minimum to a maximum. De

sired combinations of color effects are also readily producing what might be termed cloud like efa fects of color and color combinations by water i floatation. The color is deposited upon the pulp Pool on the Fourdrinier wire so as to spread freely by floatation thereover being carried bythe water film on the wire and this deposit is naturally at such point that this water floatation will ooour as desired. Y

The invention is adaptable for use in producing. color effects on paper of widely varying weights and one object is to provide apparatus and a process which accomplishes a partial color floata- 0 tion on a water film prior to the deposit of the color directly upon the pulp pool on the wire. Such initial color floatation is particularly desirable in connectionwith the coloration of heavy paper where the rate of travel of the wire is relatively slow and the pulp content on the wire is particularly heavy.

A further object is to regulate the discharge of color so that it is discharged in relatively large drops; the frequency of which may be easily controlled with accuracy and to control the deposit of' color by -a control exercised over the discharge or color through the return color pipe that leads from the color discharge nozzle pipe back to 'a color reservoir.

A meritorious featurelies' in the provision of a fluid color circuit wherein liquid color is maintaned under pressure in a .nozzle pipe to be discharged therefrom through a plurality of nozzles which feed the color in drops to the pulp pool on the Fourdrinier wire and to control the discharge 5 of color through said nozzles by a control exercised over the main outlet pipe that leads from the nozzle pipe.

Other objects and meritorious features of my invention will more fully appear from thefollowing specification, appended claims, and accompanying drawings wherein:

Fig. 1 is a diagrammatic view of that part of the Fourdrinier wire of a paper machine whereon the color is deposited,

Fig. 2 .is a view taken across the Fourdrinier. wire showing the same in cross section and showing the color deposit apparatus in elevation,

Fig. 3 is a plan view of the color depositing apparatus, 2

Fig. 4 is an enlarged sectional view of the discharge nozzle, and j Fig. 5 is a sectional view of the outlet for the discharge nozzle showing the spreader plate.

The invention resides in the apparatus for depositing color and primarily of the control which is exercised thereover and as the same is adaptable to. an ordinary paper making machine it is not necessary to describe the construction of such machine. In the diagrammatic view of Fig. 1 the Fourdrinier wire is indicated as I 0. It travels over table rolls l2 and a. breast roll I 4 arranged underneath the head box I6 out of which the liquid stock is discharged underneath the slice i8 which is adjustable as in ordinary practice. The machine is broken away so that it does not show the complete extent of the wire butthe guide and stretch rolls are indicated as 20 and 22 respectively and certain suction boxes are in dicated as 24.

' It will. be seen that the color i's deposited upon the pulp pool on the Fourdrinier wireat a point adjacent the head box and substantially in fro'nt of the suction boxes and where there is considera'ble water in the stock. The Fourdriniergwire 45 and table rolls shakehorizontally across themachine during its operation flsithe wire travels 1on gitudinally but apparatus for the accomplishment or this is not shown as it is standard construction on paper making machines. 1

I provide means for depositing color in'drops on the pulp pool which includes means for depositing different" colors and therefore a plurality .of color tanks. As'each of the systems is'similar a only one will be described. In Fig. 2 I show a color reservoir 26 which is adapted to. contain any desired liquid color. Pump mechanism indicated generally as 28 feeds such color into a head tank 36 where the color is maintained at a constant level by the stand pipe '32 so that a constant head of color is maintained to fiow through the conduit 34 to the nozzle pipe 36. This nozzle pipe extends transversely across the Fourdrinier wire at a point above the wire but below the head tank 30. The nozzle pipe is supported by suitable frame work 38 mounted in any desired fashion upon the frame of the machine. Brackets 40 are shown supporting the nozzle pipe. provided with a plurality of discharge nozzles indicated generally in Fig. 2 as 42. These are described more in detail hereinafter.

-The nozzle pipe has a'return flow conduit 44 which is'of as large or larger cross sectional inside diameter as the intake pipe 34 and which leads from the upper side of the nozzle pipe back to discharge into the intake funnel 41- of the color reservoir 26. This outlet conduit; 44 is provided with a control valve 46 to regulate the discharge of color from the nozzle pipe through the discharge nozzles in a manner hereinafter described.

'In Fig. 3 I have shown a system of such color distribution circuits wherein four color tanks are provided and four nozzle pipes. Each of these circuits has been described and illustrated in Fig. 2 and the construction shown in Fig. 1 merely illustrates a method of ganging these several circuits together. The nozzle pipes of the several circuits might be staggered as to the arrangement of their nozzles so that the deposit of color on the wire can be arranged as desired. Obviously each color tank might contain a different color or two tanks might contain the same color or'all of the tanks might be filled with the same color. This is purely a matter of regulation and control to suit, the particular situation.

In Fig. 2 I have shownthe four nozzle pipes indicated as 36 as supported from the frame 36 as heretofore described and each nozzle pipe 36 is provided with an outlet nozzle proper indicated as 48. This nozzle projects up into the pipe so that foul material will not clog the passageway 56 that extends therethrough and there is secured to the lower end of the nozzle 48 one end of a Y-pipe 52. This Y-pipe has another end or tube portion 54 which is opened to the atmosphere. The Y-pipe is supported by a stringer 56 which, as shown in Fig. 2, may be carried by brackets 58 depending from the nozzle pipe 36. To the lower end of the v-pipe is secured a rubber hose 6!! which is mounted at its lower end on carrier plate or stringer 62. In the construction shown only two of these carrier stringers 62 are retained and as four nozzle pipes are shown the hose sections 66 from two of these nozzle pipes 66 indicated are carried to each stringer 62 as shown in Figs. 1 and 2.

These stringer sections 62 are adjustable transversely of the Fourdrinier wire as they-are supported by brackets 64 which are secured to the frame of the machine and each of the stringer sections is provided with aislot 63 indicated in Fig. 2 which permits this transverseadjustment and consequently a variation of the point of deposit of the color from the hose onto the pulp on the wire. The stringer 62 is likewise rotatably adjustable for a purpose to be hereinafter described by the same bracket support as it will be noted that the brackets'64 support the stringers 62 through an angle bracket 66 which is supported upon a trunnion 68 that has a wing nut 10 which The nozzle pipe is Fig. 5 adapted to discharge water onto the spreader plate. This spray pipe has a multiplicity of discharge outlets for water so that a film of water fiows constantly over the spreader plate and the spray pipe is-connected to a su table source of water supply for this purpose. This spreader plate is not a support except in conjunction with coloration of certain weights of paper. It is particularly useful in connection with the coloration of paper of heavy weight where the screen travels at a slow rate and the pulp content andthe stock is particularly heavy. Functioning of the color apparatus with the exception of the spreader plate is the same in all cases.

The control is exercised as follows: Liquid color is pumped from the reservoir 26 into the head tank 30. It flows from this head tank through conduit 34 into the nozzle pipe 36. The nozzle pipe is provided with a vent tube 31 which has a .vent valve 39 of conventional construction so that theair is forced out from the nozzle pipes and the same are filled with liquid. When the nozzle pipe is filled with liquid and the air has been completely vented out of the system the functioning of the apparatus is controlled by the "valve 46. It will be seen that the valve 46 is disposed in the outlet pipe 44 and that this outlet pipe communicates with the upper side of that end of the nozzle pipe opposite the end into which liquid color is admitted. It will also be noted that the outlet conduit 44 is larger than the inlet conduit 34. If the valve 46 is opened only a slight way there is a very large discharge of liquid color through the nozzles from the nozzle pipe. If the this air entering the color stream breaks up the color into substantially large drops which are discharged from the lower end of the Y-tubea. The color may be discharged in relatively large drops of color alternating with short columns of .air and'as color bubbles from the lower end of the rubber hose sections which is secured to the discharge end of the Y-tube.

In the case of mechanism being used for the coloration of a very light weight paper which travels with the screenat a rapid rate and which has a relatively small amount. of fiber stock in the water content, the color may be discharged in drops from the rubber hose directly onto the pulp pool on the wire. These drops. spread by water floatation through the pulpv pool and produce a particularly attractive cloud like elect in the resulting sheet. of paper. Through the 'use of the control which I have provided it is possible to vary accurately the distribution of color by my improved system so that color efiects may be graded from a minimum cloud like color effect to,

amount of fibre in the stock, in order to provide proper distribution of color I have employed the spreader plate whereby'an initial color flotation is produced on the plate itself by depositing the color drops onto the moving film of water as it travels over the plate to.discharge over the edge gravity into said nozzle pipe to maintain the same substantially full of liquid color, an outlet pipe provided with a valve for regulating the fiow of liquid color therethrough, and means for admitting air into the color stream of each nozzle to break .up the same into drops.

3. Apparatus for discharging controlled color drops onto the pulp pool on a Fourdrinier wire of a paper machine which comprises a nozzle pipe arranged transversely above said wire and provided with a plurality of nozzles adapted to discharge color, means for feeding liquid color by gravity into said nozzle pipe to maintain the same substantially full of liquid color, an outlet pipe provided with a valve for regulating the fiowof liquid color therethrough, a curved spreader plate extending transversely of the Fourdrinier wire thereof onto the stock on the screen. Throughunderneath the nozzle pipe adapted to catch color the use of this spreader plate an initial floatation of color is accomplished and an excess of water is put on the screen at the point of "color discharge thereon with this initially distributed color and the resulting floatation on the pulp stock on the screen is sufiiciently complete to produce the eifects desired. Transverse adjustment of the spreader plate assembly has previously been described. Rotatable adjustment of the spreader plate assembly by adjustment of the stringer 62 on its rotatable support will deposit color drops either near to or far away from the edge of the spreader plate.

What I claim:

1. Apparatus for discharging controlled color drops onto the pulp pool on a Fourdrinier wire of a paper machine which'comprises a nozzle pipe arranged transversely above said wire and provided with a'plurality of nozzles adapted to discharge color, means for feeding liquid color by gravity into said nozzle pipe to maintain the same substantially full of liquid color, an outlet pipe, means for controlling the discharge of color from said nozzles by regulating the flow of liquid color through said outlet pipe, and a .Y-pipe for each nozzle having one tube of the Y communicating with the color nozzle and the other tube of the Y communicating with the atmosphere.

2. Apparatus for discharging controlled color drops onto the pulp pool on a Fourdrinier wire of a paper machine which comprises a nozzle pipe arranged transversely above said wire and provided with a plurality of nozzles adapted to discharge color, means for feeding liquid color by discharged therefrom, and means for feeding a controlled water film over said spreader plate to receive the color discharged thereon and to in turn discharge onto the Fourdrinier wire.

4. Apparatus for discharging controlled color drops onto the puip pool on a Fourdrinier wire of a paper machine which comprises a nozzle pipe arranged transversely above said wire and provided with a plurality of nozzles adapted to discharge color, a spreader plate arranged underneath said nozzle pipe to catch the color discharged therefrom, means for causing a water film to flow over said spreader plate to receive the color discharged thereon, said spreader plate arranged to discharge said water film onto the pulp pool of the Fourdrinier wire of the paper machine.

5. Apparatus for discharging controlled color ,drops onto the pulp pool on a Fourdrinier wire of a paper machine which comprises a nozzle pipe arranged transversely above said wire and provided with a plurality of nozzles adapted to discharge color, a Y-pipe forming a continuation of each nozzle to receive the color discharged there- 3 

